Door lock



J an. 16, 1923.

D. DONALD.

DOOR LOCK. HLED ocr. 10, :921. 2 SHEETS-SHEEI 2.

Patented Jan. 16, 1923.

I UNITED: s s

DONALD DONALD; OF SYDNEY, NEW SOUTH WALES, AUSTRALIA.

noon Locx.

Application filed October 10, 1921. Serial No. 506,796. r j

To all whom it may concave."

Be it known that I, DONALD DONALD, a subject of the King ofGreat Britain and Ireland, residing at Rushcutters Bay, Syd

ney, New South Wales, Australia, have invented certain new and useful Improvements in Door Locks, ofwhich the following is a specification. 1 1 v This invention relates to door locks of the type having a tubular casing, and the object of the invention is to effect certain improvements whereby (a) the length of the casing can be reduced so that it can be fitted to light cheap doors having narrow stiles, (6) whereby the cost of manufacture is reduced and ('0) whereby the springs controlling the moving partsare strengthened thus increasing the efliciency and add,- ing to the life of the lock.

A further improvement is that the handles which operate the lock boltare ren dered silent in operation. 7 l j The improved lock is constructed in two longitudinal sections hereinafter referred to as A and B which are'adapted to be placed and held together to. form a'complete tubular cased lock, with spring controlled bolt C, locking mechanism D, and operating, handles E.

Referring to the drawings which illus; trate the improved loo'k, I

Figure 1 is a'perspective view of locksec tion A with movable parts removed there"- from. 1,. Figure 2 is a similarview of lock section Figure 3 is a plan of lock bolt G removed fromcasing.

Figures 1 and 5 are perspectiveflviews of the sliding and rocking plates respectively which form the bolt locking mechanism .D.

Figure 6 is a sectional elevation of lock' section A showing slide locking plate Fig-, ure 4 in position.

Figure 7 is a section through line 1'r I p tion to casing A'and both casings A and B I Figure 6. r

Figure 8 is a side'elevation of lock section A showing slide plate. Figure e and rocking plate Figure 54in position."

Figure 9 is a side elevation of lock section Bwith spring controlled bolt 0 re-. moved therefrom.

Figure 10 is a section through line ;0-p Figure 9 showing bolt C in position.

Figure 11 is a sectional plan showing complete lock fitted in door stile.

Figure 12 isa line s-s Figure 11.. "Figure 13 is a section through line ow Figure 11.

Figure 14 isa perspective of the, as

cross sectionof lockon sembled lock ready for fitting in door stile. 1 I

Figure 15 illustrates a key suitable-for operating the locking mechanism D.

The casing of'lock section 1A;is-, a one piece metal casing semi-circular in cross section, having-at one end an anchor plate 15 with bolt aperture 16 and screw holes 17.

The other'end of easing hasa sem'i circular plate 18' with projecting t0ngue,1 9.. A -por tion of the, interior of the casing is thickened I to form a fiat bed plate 20 in whichi's formed a recess 21 adapted to.housea coil spring 7 I' 22. A stud 23 projectsffrom thebedplate 2Q, and segmental --key' wards 24 areppro- V ded on each sideof akey way to out into the wallof-the casing.

Between the endwall 18 and the bed plate 20 a rectangulanaperture 26 is; formed inthe casing wall. The'locking mechanism D which fits within lockj'sec'tion A' 'consistsf of a sliding plate 42.1 am oscillatingplate 5. The plate et has a bracket2T' projecting from its under face,fa stud'28 projecting from its upper face and an 'openslot'29. The plate 4 fits into, section A asshown in Figures 6, 7, Sand is held jinits normaljposition by coil spring .22 in recess 21 which bears .against'the bracket27. The plate can only be moved" from; itsfinormal posig.

tion by the action of'lakey bearing-against its curved edge -30.. Theoscillating-and locking plate 5which'is rotatablyinounted on the stud v23, has a. rearw'ardly projecting locking p1ece31 and downwardly projecting lockingpiece 32.,and a bifurcated curved front edge 33 which is, adapted to :be en-" gaged by a key to oscillate the'plate in either Y direction, for'the purpose and'inthe manner hereinafter explained. i

The lock casing B is similar in cross sec? with their internal-fittings ate, dapted to be assembled as shown in Figure 14 reform a. tubularlock. The casing 13 has projecting segmental key wards 34l,'and aperture 35 so positioned that when the sections are assembled they directly oppose the key wards shown in Figure 10, and is held in its normal projected position by a coil spring 37 which bears between the fixed bracket in casing B and cross studded partition 38 on bolt C. A stud 50 projects inwards from the bolt C and is so positioned as to en gaged when desired by the oscillating plate 5 of the locking mechani'sm'l) tor the purpose of securing the bolt in the proj'ected or withdrawn position. The rear end of the bolt 0 is in the form of a disc] 39 which is movable in the rear portion of the tubular casing formed when the sections A and B: are assembled by the operation of pivoted lever handles E. a

The operating ends 44 of handles E which are pivoted at 40' in anchor plates 41 pass through holes 42in door stile 4 3 and enter the, tubular casing of the look through the opposingapertures 26 and therein. so as to engage the disc 39 to operate ,the bolt 0 inwards against the pressure of spring 3''? as illustrated in Figures 11 and 13. Rubber sleeves 45 are provided on the short arms 44 in order to deaden' any sound that i may be caused by making contact with the 28"and enablingthe key on being further disc 39. The operation of the locking mechanism is as follows :Normally the bolt C is free to be moved backwards or forwards for the reason that the stud 50 which projects therefrom has an unobstructed path of travel. When it is desired to lock the bolt C in the projected position the oscillating plate 5 is rotated to bring the projection 32 thereon intothe path of the stud 50 on bolt G as shown, in Figure 8. This is accomplished by a key 51 with clefts 52 adapted to engage the wards 24 and 34;: which after being inserted through the 'k6 \'TW:Ly 25 is adapted on rotation to first move the slide plate l'rearwards thus, tr'eeingthe oscillat ing; plate 5 from engagement with the stud rotated to oscillatethe plate 5 in either direction so as to bring the projection v31 thereon into position either above or below thestud28 on plate 4. As soon as the key looses contact with the plate 4E the plate springs back into its normal position and holds theplate 5 in its set position either out of or in the pathot the stud 50. The case sections A and B are held together when assembled by a metal clasp 5?," and prevented from moving laterally by tongues 19 which en a e corresdondin r slots in the in g n a v w "h opposlng sections. I' claim.

1'. An improved'door lock comprising :1

oted lever handles which pass through 01)- posing apertures in both-case sections, mechanism for locking the said bolt mounted in the opposing case section. and adapted to be actuatedby a key, opposing key ways and circular key wards in each of the case sec tions, and an anchoring plate with bolt aperture therein on one of the case sections substantially as, and for the purpose herein set out. i

2. An improved tubular lock for doors comprising a longitudinally dividedol-iter tubular casing having a face plate, key apertures and lover apertures and a bolt having a projecting stud within said casing actuated outwards by a spring bearing against a fixed bracket, and inwards by pivoted levers having rubber sleeves adapted to bear against its rearward end; and a bolt lockingmecha-nism consisting of a sliding plate with a spring and a projecting stud. an oscillating plate adapted to be moved about a fixed pin into or out of the path of the first mentioned projecting stud substantially as herein described and illustrated in the drawings.

3'. A door lock comprising a tubular lock casing constructed intwo corres mnd-ing longitudinal sections adapted to be fitted together each of which is semi-circular in cross-section and has at one end a semi-circular end plate and one of; which has at theother end an anchor plate formed. with a bolt aperture and screw holes, a portion, of the interior of one of said sections being thickened to f orni a fiat bed plate in which is'formed a recess adapted to house a coiled spring, and a rectangular aperture between the bed plate and the semi-circular end plate and the other section of which is formed with a rectangular aperture opposed to the rectangular aperture in said first mentioned section and with a projecting bracket at the forward end of said aperture, both of said sections havingsegmental key wards pro-- vided on each side oi a key way out in the wall oi the casing. i

In testimony whereof he has aliixed his signature in presence of two witnesses.

I DONALD DONALD. Witnesses: i

T. C. ALLEN,

N. E. GODDARD. 

